Recently, Ive been doing just that, I dont grab onto work in all projects in a row. Now I participate in only two or three campaigns, as my wallet is full of coins, which maybe not recover in the future.
Your personal experienced will tell you not to waste your time anymore, do more research and be selective when participating with any bounties. There's some projects who still possible to excel after being listed as long as the team will make more efforts and improvements. If the team is actively working with the communities there's still chance for that project to bring decent and not to waste your wallet space.
There's no assurance if what fate will bring to your work, everything is dependable from how the project will succeed.